Mounting arrangement for lock mechanism



E. HENSEL 2,986,919

MOUNTING ARRANGEMENT FOR LOCK MECHANISM 3 June 6, 1961 5 Sheets-Sheet 1 Filed July 16, 1956 9 W a a 9 M 6, m 1 m =5 m. w r 4 M I V w INVENTOR EQ/av Awssz June 6, 1961 E. HENSEL MOUNTING ARRANGEMENT FOR LOCK MECHANISM 3 Sheets-Sheet 2 Filed July 16, 1956 HT 1 w T 1:.7 1Z0 W aim 1 Ill/Ill INVENTOR ik/cw #ewseL J1me 1961 E. HENSEL 2,986,919

MOUNTING ARRANGEMENT FOR LOCK MECHANISM 3 Sheets-Sheet 3 Filed July 16, 1956 Wlllllllll/lllzllllqm II/ll' INVENTOR A E/Cl! flewssL United States Parent 2,986,919 MOUNTING ARRANGEMENT FOR LOCK MECHANISM =Erich Hensel, Postschliessfach 518, Detmold, Lippe, Germany Filed July 16, 1956, Ser. No. 597,909

Claims priority, application Germany Oct. 14, 1955 2 Claims. (Cl. 70-451) This inventioin relates to door locks and has particular reference to a new and useful lock adapted to be conveniently secured within the recess in the edge of a door, and may be applicable as a right hand or left hand lock.

Known immersion locks of this kind are made almost exclusively of metal, usually iron. For this reason the production of such locks involves comparatively many working operations, and a comparatively great deal of iron is used, thereby rendering the locks heavy and voluminous. Because of this the doors must be made thicker than necessary, and it has therefore not been possible in the past to make doors in the most economical and technically convenient way.

It is an object of this invention to provide a lock of the kind described, which is simpler in construction and smaller than the known locks and is suited for manufacture in thermoplastic materials so that the lock can be produced by automatic machines. A lock of this kind is rust proof and it can be fastened in the door without the use of screws. Furthermore, it can be made very light and flat and may easily be constructed in such a way that even an unskilled will be able to mount or dismount it or to take it apart.

These advantages are achieved by the lock according to the invention wherein the lock comprises a hollow casing having front, side, top, bottom and back walls adapted to be fitted into a recess in the edge of a door. The front wall of the casing is provided with an outer face adapted to be set flush with the edge of the door when the casing is fitted into the door. The casing side walls extend from the front wall into the door and have at least one opening to receive a locking member. An opening is also provided in the front wall and a partition wall is spaced inwardly from the front wall and extends between side walls. A pivot shaft is rotatably mounted on the partition wall and it holds a flat elongated knife edge engagement or locking member which may be rotated from an inoperative release position entirely within the casing to an operative locking position passing through the opening in the side wall and engaging the door to secure the casing in the recess of the door.

The invention will be further described in the following with reference to the annexed drawings, in which FIG. 1 is a longitudinal section through a lock in its locking position,

FIG. 2 shows the same with the lock in open position,

FIG. 3 is a section taken along the line IIII II in FIG. 1,

FIG. 4 is a section taken along the line IV IV in FIG. 1,

FIG. 5 is a section taken along the line VV in FIG. 2,

FIG. 6 is a. section taken along the line VIVI in FIG. 1,

FIG. 7 is a longitudinal section through a lock with a snap latch and a stop latch operated independently thereof,

FIG. 8 is a section taken along the line VIII-VIII in FIG. 7,

FIG. 9 is a section taken along the line lX- lX in FIG. 7,

FIG. 10 is a section taken along the line XX in FIG. 7,

FIGS. 11 and 12 are longitudinal sections through locks according to two further embodiments,

FIG. 13 shows an escutcheon, seen from the flat side,

FIG. 14 shows the escutcheon, seen from the. edge,

FIGS. 5-17 are side views of diiferent embodiments of the snap latch, and

FIGS. 18 and 19 show a longitudinal section and an end view, respectively, of a lock with latch.

The lock parts are preferably made of thermoplastic material. The lock includes fiat casing parts 1 provided with cuttings 6a, 12a, 16a, 18a and detachably connected to each other by means of clips. The casing parts 1 together form a flat lock housing rounded at the upper and lower narrow walls.

According to the embodiment shown in FIGS. 1-6 the.

front surface of the lock forms a cavity 4 partly covered by a cover plate 3. In the cavity 4 there is arranged an adjusting screw 5 to which screw there is firmly secured a narrow fastening plate 6 with sharpened points which are able to penetrate the wood of the door so as to secure the lock in the door. By gripping behind the cover plate B with a tool the lock can be drawn out of the recess in the door.

The snap latch comprises a latch head 8 and a slidable part 9 provided with a stop projection 10, a recess 11 and a pin 13 for receiving a spring. The two parts 8 and 9 of the latch are mortised together and are secured to each other by means of a through bolt 12.

A spring 15 encloses the pin 13 and a corresponding pin 14 at the end of the lock housing. In the cutting 16:: there is inserted a handle bushing 16 connected to a lock arm 17 engaged in the recess 11 in the snap latch and covered with a thermoplastic material.

A bushing 18 adapted to left hand locks as well as right hand locks is loosely inserted. In the cutting 18a the bushing 18 has a projection 19 on which a lock secured device 20 is detachably mounted (FIG. 1). I

A stop latch 21 adapted to keep the snap latch in the locking position is inserted under the snap latch 8, 9 and between the stop projection 10 and the handle bushing 16. The stop latch 21 has a recess 22 for receiving the key web and is provided with a locking member 23.

On both sides of the door there is placed an escutcheon 25 arranged to conceal the bores for the handle bushing 16 and the bushing 18. The escutcheon 25 is provided with projecting pins 26 to be glued into corresponding holes in thedoor. (See FIGS. 13 and 14.)

The lock according to FIGS. 7-10 is especially adapted for outer doors and has no stop latch 21. Instead of this a locking latch 24 is arranged in the lower part of the lock casing. An ordinary lock spring 15a is used instead of the screw spring 15 in this embodiment. The lock is otherwise substantially the same as the embodiment shown in FIGS. 1-6. 'It should be noted, however, that the plate 6 has only one arm.

The immersion lock according to FIGS. 11 and 12 is constructed as a snap lock with a stop latch 21b. It is specially suited for use in light furniture doors on account of its simple and compact construction, and because it can be secured in the locking position by using a key.

According to the embodiments shown in FIGS. 15-18 the snap latch 27 is arranged separately in a casing 28, and the pressure of the screw spring 15b can be adjusted by means of an adjusting screw 29. The furniture lock shown in FIG. 18 allows two turns of the key by locking. This lock also may be provided with a snap latch 27.

In order to facilitate the drawing out of the lock shown in FIGS. 7, 11, 12, 15, and 18 the latch head has a through bore 32 into which a tool can be inserted.

By assembling a lock of the kind described, the lock parts i.e. the snap latch 8, 9, or 7a, the spring 15 or 15a, the lock arm 17, the stop latch 21 or 21b, the locking Patented June 6, 1961 latch 24, the key bushing 18 and the lock securing device 20, are placed in the casing parts 1 after which the casing parts are connected with each other by means of clips. The assembled lock is inserted into the recess of the door, and with a screw driver the screw 5 is turned until the points of the fastening plate are forced into the wood and thereby will fasten the lock. The escutcheons are then mounted with an ordinary door handle.

Where a left hand lock is to be changed into a right hand lock, the snap latch 8, 9, is retracted, and the bolt 12 is pressed out of the cutting 12a in the lock casing. After that the latch head 8 is dismounted from the slidable part 9, is turned 180 and again placed on the slidable part 9 in its new position. The bolt 12 is then pushed into the bore in the latch parts.

The most important advantage obtained by the new lock resides in the fact that considerable savings in material and work hours can 'be attained in the production because all the lock parts can be produced by automatic machines from one single kind of material. Furthermore, the lock has less thickness than a corresponding lock of known construction, so that the door can be made thinner. In addition to this, the lock is easy to mount and dismount and is easy to take apart for renewal of worn or damaged parts.

What I claim is:

1. A door lock comprising a hollow casing having front, side, top and bottom and back walls adapted to be fitted into a recess in the edge of a door, said front wall on said casing having an outer face adapted to be flush with the edge of said door when said casing is fitted into said door, said casing side walls extending from said front wall into said door, at least one of said side walls having an opening, said front wall having an opening, a partition wall spaced from said front wall and extending between said side walls across the opening in said front wall, a pivot shaft rotatably mounted in said partition Wall and extending through said partition wall, and spaced from said front wall, tool engagement means on the end of said pivot shaft facing said front wall, a fiat elongated knife edge engagement member secured to said pivot shaft with its plane perpendicular to said pivot shaft and in alignment with the opening in said side wall, said engagement member being rotatable from an inoperative position entirely within said casing to an operative position passing through the opening in said side wall for engaging the 2,986,919 v p e a door when said casing is fitted into the door, whereby the casing is secured in the recess in said door.

2. A door lock comprising a hollow casing having front, side, top and bottom walls adapted to be fitted into the edge of a door, said front wall on said casing having an outer face adapted to be flush with the edge of said door when said casing is fitted into said door, the side walls on said casing extending from said front wall into said door, said side walls each having an opening equally spaced from said front wall, said front wall having an opening extending into the interior of said casing, a partition wall spaced from said front wall and extending between said side walls across the opening in said front wall, a pivot shaft rotatably mounted in said partition wall and extending through said partition wall toward the opening in said front wall, and spaced from said front wall, tool engagement means on the end of said pivot shaft facing said front wall, a flat elongated knife edge engagement member secured to said pivot shaft on the portion of said pivot shaft extending away from the opening in said front wall, said engagement member being comprised of two diametric portions with planes perpendicular to said pivot shaft and in alignment with the openings in said side walls, said engagement member being rotatable from an inoperative position entirely within said casing to an operative position passing through the openings in said side walls for engaging the door and securing the casing in the door.

References Cited in the file of this patent UNITED STATES PATENTS 180,651 Schilling Aug. 1, 1876 867,574 Egge Oct. 8, 1907 927,442 Arens July 6, 1909 1,052,105 Van Hoesen Feb. 4, 1913 1,642,313 Smith Sept. 13, 1927 1,855,089 Boothe Apr. 19, 1932 2,470,771 Harvey May 24, 1949 2,508,702 Baume May 23, 1950 2,581,313 Seaman et al. Jan. 8, 1952 2,601,775 Jewett et al. July 1, 1952 FOREIGN PATENTS 100,906 Great Britain July 27, 1916 

